Utinomiella dimorpha ( Henderson, 1906 )

Castro, Peter, 2011, Catalog of the anomuran and brachyuran crabs (Crustacea: Decapoda: Anomura, Brachyura) of the Hawaiian Islands 2947, Zootaxa 2947 (1), pp. 1-154 : 112-113

Utinomiella dimorpha ( Henderson, 1906)

Cryptochirus dimorphus Henderson, 1906: 214 , pl. 8 [type locality: Andaman Is.; type material: IM?].

Hawaiian Is. records:

Pseudocryptochirus kahe McCain & Coles, 1979: 81 , figs. 1, 2, pl. 1 [type locality: O‘ahu; holotype: BPBM S8512 ].

Utinomia dimorpha ( Henderson, 1906) — Takeda & Tamura 1981: 23, fig. 3, pl. 4 [O‘ahu].

Pseudocryptochirus kahe McCain & Coles, 1979 — Coles 1986: 310, 312 [H.I.]. — Hoover 2006: 289, color photograph [O‘ahu].

Utinomiella dimorpha ( Henderson, 1906) — Kropp 1990: 443, fig. 14 [holotype of P. kahe ].

Taxonomy. Takeda & Tamura (1981, as Utinomia dimorpha ), Kropp (1990)

Geographical distribution. Eastern Indian and western Pacific oceans, Hawaiian Is.

Habitat. Forms cavities, round at the surface, in scleractinian reef corals ( Pocilloporidae ); shallow subtidal, 1–29 m.

SUPERFAMILY GRAPSOIDEA MacLeay, 1838

Family Gecarcinidae MacLeay, 1838

Rathbun (1906: 838) listed two specimens of Discoplax rotunda (Quoy & Gaimard, 1824) (as Cardisoma rotundum ) collected in Oahu in 1864 and deposited in MCZ (lot 5769). No additional Hawaiian Is. records of gecarcinid land crabs exist [see Edmondson (1962b), who lists Rathbun’s record as C. hirtipes Dana, 1852 , a distinct species] so it appears that the two specimens examined by Rathbun were possibly erroneously labeled. Discoplax rotunda occurs in other Pacific islands, including the Line Is., but there are no known subsequent records from the Hawaiian Is. Both D. hirtipes and D. rotunda were nevertheless listed as occurring in the archipelago by Sakai (1976, both as species of Cardisoma ) and D. rotunda questionably by McLaughlin et al. (2005). P.K.L. Ng (personal communication) agrees that these records are “almost certainly [the result of] mislabeling.” Paulay & Starmer (2011) similarly concluded that the MCZ lot most probably did not originate in the Hawaiian Is. Discoplax was reviewed by Ng & Guinot (2001).